ASPEN AEROGELS INC (ASPN) Stock Institutional Trading Activity


ASPEN AEROGELS INC (ASPN) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q3 2025), investors with some of the largest reported share count changes include First Eagle U.S. Value, Renaissance Technologies LLC, and Ariel Appreciation Fund. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.

Explore more:

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q3 2018Ariel Appreciation FundBuy181,1001,838,989$8,404
Q3 2018Renaissance Technologies LLCBuy39,101468,801$2,142
Q2 2018Ariel Appreciation FundBuy454,9331,657,889$8,124
Q1 2018Ariel Appreciation FundBuy112,0581,202,956$5,137
Q1 2018Renaissance Technologies LLCBuy74,700429,700$1,835
Q4 2017Ariel Appreciation FundSell-4,6191,090,898$5,324
Q4 2017Renaissance Technologies LLCBuy31,800355,000$1,732
Q3 2017Ariel Appreciation FundBuy1,5201,095,517$4,765
Q3 2017Renaissance Technologies LLCBuy20,500323,200$1,406
Q2 2017Ariel Appreciation FundSell-389,8751,093,997$4,868
Q2 2017Renaissance Technologies LLCBuy40,200302,700$1,347
Q1 2017Ariel Appreciation FundSell-171,4541,483,872$6,158
Q1 2017Renaissance Technologies LLCBuy29,200262,500$1,089
Q4 2016Ariel Appreciation FundBuy933,5891,655,326$6,836
Q4 2016Renaissance Technologies LLCSell-100233,300$964
Q3 2016Ariel Appreciation FundBuy721,737721,737$4,302
Q3 2016Renaissance Technologies LLCBuy13,900233,400$1,391
Q2 2016Renaissance Technologies LLCBuy73,000219,500$1,091
Q1 2016Renaissance Technologies LLCBuy18,400146,500$659
Q4 2015Renaissance Technologies LLCBuy32,142128,100$778
Q3 2015Renaissance Technologies LLCBuy95,95895,958$720

Frequently asked questions about ASPN activity

  • Which institutional owners are buying ASPN?

    Institutional owners buying ASPN include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in ASPN activity?

    "Buy" means an investor increased their reported position in ASPN compared to the prior reporting period. This reflects growing exposure to ASPEN AEROGELS INC (ASPN) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in ASPN increasing?

    Institutional interest in ASPN can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.